Check my writing please

Hi. Would you please check my writing?

"Once there was a poor couple, who lived in a pigsty. The man was content with his life and job as a fisherman, but his wife was very ambitious.
One day, the fisherman caught a big fish with magic powers, who spoke and asked for its life. The fisherman released him without asking for anything in return. Being aware of this incident, his wife made him go back and ask for a cottage. The enchanted fish granted her wish happily.

After a while, the greedy woman started asking for more and more things. To the fisherman's surprise, all of the wishes were granted by the fish. Now, She was ruling an empire. However, she still wasn't satisfied. "If I were pope, I would be much happier," she said. Being afraid to disobey, her husband took this wish to the fish, too.

After being a pope, she began to think of how interesting it would have been if she had been the lord of the universe! "If I were like the lord of the universe, I would feel much happier," she said. When the enchanted fish heard this request, it got super angry and brought them back to their former life in the pigsty!"

Any suggestion would be appreciated.